UK Mortgage
£750,000 mortgage at 4.5% over 20 years
A £750,000 repayment mortgage with a 4.5% fixed interest rate spread over 20 years would cost approximately the amounts shown below. Figures are illustrative — your actual rate depends on loan-to-value, credit score and lender.
Monthly repayment
£4,744.87
Total interest
£388,768.88
Total repaid
£1,138,768.88
Based on the standard amortisation formula. Excludes arrangement fees, valuation fees, stamp duty and insurance.
What does a £750,000 mortgage cost per month?
At 4.5% APR over a 20-year term, the monthly repayment on a £750,000 mortgage is about £4,744.87. Over the life of the loan you'd repay £1,138,768.88 in total — of which £388,768.88 is interest.
The same loan over 15 years would be cheaper overall but higher each month. Stretching the term reduces the monthly cost but increases lifetime interest.
How to lower the repayment
- Increase your deposit to reduce the loan amount.
- Improve your credit score before applying — even a 0.25% rate cut saves thousands.
- Compare whole-of-market brokers, not just your high-street bank.
- Consider overpayments — most UK lenders allow 10% per year fee-free.